RHV supports watchdog device for linux guests that restarts virtual machines in case of OS failure. High availability (in addition to monitoring physical hosts) also monitors all virtual machines, so if the virtual machines operating system crashes, a signal is sent to automatically restart the virtual machine, but this is with host change.
Product :
Red Hat, RHV/4.2, RHV
Feature :
Integrated HA (Restart vm), HA/DR, VM Mobility and HA